"I" ve seen all the great fighters in the last thirty years.
这个人说：“过去三十年当中所有有名的拳击手我都看过。”
The last time we hosted a similar event was in 1968, thirty years ago.
上一次我们主办同类活动是1968年，也就是三十年前。
He had worked in that factory for thirty years by the end of last year.
到去年年底他已经在那家工厂工作了30年。
The last thirty years have great changes in China.
近30年中国发生了巨大变化。
The last thirty years have great changes in China.
近30年中国发生了巨大变化。
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